Pump for refrigerating systems



April 8 1924;

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April 8 1924.

s. M. MILLER PUMP FOR REFRIGERATING SYSTEMS Filed Ju 1 a, 1921 2 Sheets-Shgt 2,

, M W// nnnnnnnnnnnnn waw 3% Patented Apr. 8, 19 24.

UNITED STATES PA -Wt OFFICE- soLoMon IL R,orcnrcneogrnnnvors.

PU P FOB; BEFRIGERATING" sYsrEMs.

Application filed July 8,

7 '0 all whom it may concern Be it known that I, SOLOMON M. lVLiLLnR, a citizen of the United States, residing at Chicago, in the county of (look and State Of:

Illinois, have invented a new and useful Improvement in a Pump for Refrigerating Systems, of which the following is a specification.

My invention relates to refrigerating" systems, and more particularly to the means for pumping, compressing and propellin'gor imparting motion to the refrigerating fluid carried through the system. .One of-the primy invention are the provision of apump that is compact in construction; is novelin its principles and effective in-performingthe functions 'for which it has been designed.

after an understanding of my invention is had.

Referring to the drawings that formapart of this specification, Figure 1 is asch'e-I matic view of a refrigerating system shoW-' 1ng thearrangement of the divers elements,

including'my improved generator. or'-pump'.* 1 Figure 2 is a longitudinal section of the? pressure regulating chamber, draW-nito an enlarged scale.

Figure 3 1s a central longitudinal secti on upon an enlarged scale of the pump ngmechanism shown in Figure 1.

Figure 4 is a; central vertical section of another of the regulating devices. Figure 5 is a transverse vertical section of. the pumping mechanism on line l 55, Fig ure3. Y I

Referring more particularly: to Figureil;

of the drawings, it will be seen Ihave illus} trated my invention as applied to a house hold or domestic refrigerator, the s'ame*'be-' ing designated by numeral 10,'a'nd drawn schematically. Within the chamber formedbythe Walls of the refrigerator is a coil 11 through which the refrigerating fluid flows to cool the chamber." Uponthetop of the refrigerator is positioneda tank 12 of suit-i able dimensions to receive 'a quantity of water, or other suitable fluid, and within this tanklis a small coil 13 that is in com- 1921. Serial N0. 483,147.

munication the refrigerating coil 11. through the';interposed pressure regulating.

element 14., A-shut-off cook 15 controls the passageof fluid into theregulating' chamber :14: fromcoils 13, and chamber 14: pref-.

erably comprises a cylindrical shell, closed.

at oneaend, and-having a removable cap 16 vided 1 with. an ,embossment :18 arranged axiallyjthereof'and provided with centralpassage 19. The outer ends of thispassage 19 are countersunlgas shown, and a'spindle2O of less diameterthan passage 19 is positlonedln the :latter and extends out through cap 16. The inner end of spindle 20 1s I threaded to receive a conical valve element 21 that seats inthe adjacent countersunk:

portion of passage19, and-a similar valve element 22 is positioned upon the spindle upon the opposite side of 'embossment 18 to I 1 seat in theadjacent countersunk portion of Further objects will be apparent to others m 23 of. any-suitable.

inder ld and 'theside-walls ofcup 17 and is secured inposition by means of a gasketlorv ring 23 that is clampediby screwing down. cap 16 upon. cylinder 14, as shown in detail in Figure 2. Centrally 'upon the external 7 portion oflcap 16 is a'hollow stub 24c that is internally threaded to receive aheaded:

bushing 25,'tlie latter being centrally bored,

as at'326, of greater diameter than the diameter ofspindle' 20 to'permit-the latter to move freely thereinand yet be guided thereby. A wing-nut*27 is fscrewedupon the outer ex-j tendedend 'of spindle :20 and a .coil'ed'ex pansionv spring 28 is interposed between the inner-end of bushing 25 and the adjacent portion of diaphragm 23 and. surrounding spindle'20. By adjusting. wing nut 27 therelativemovement of spindle 20'islimited for controlling valve 21 which may be manipulated without having to open the I casing. I

after passing through chamber 14L into cup 17, passes out of' the latter through. a' h o'llowstubv 29 tapped into cylinder 14 and connected at its lower end to coils'll; After transit through coils 11, the. i I

refrigerant :passe's upwardly into the pipe or extension 30 that extends through'the top of the 'refrigerator'to a regulatingde--' vice, shown in detailin F ig'ure 4. This structure comprises a cup-like receptacle 31 the lower portion or bottom. .of which .is closed and has a suitablehollow'stub '32 into which pipe 30 is screwed and its upper:

portion is closed by a cap 33, the annular flange whereof is threaded and .screwed down upon the sides of receptacle 31. WVithin this receptacle-31 is a.cup=like. structure- 34, open at its top, and having a conical shaped bottom 35,. the apex. whereof is.

formed into a central embossrnent 36 having a passageway 37.n1ade axially therethrough,

and the ends of. which are countersunk in substantially the same manner as. passage. 19, heretofore described A spindle .38

extends through this passage 37'and has a? conical valve 39. screwed uponits lower endr toiseat in the lower countersunk portionof passage 37 A similar conical valve40 mounted upon the spindle uponthe oppo; site end of stub. 36 to fit in the adjacent countersunk portion of passage 37. A dia phragm 41 of any suitableconstruction is. mounted upon'the upper end of receptacle 31 and cup 34 and is held inxplace by a gasket or ring42 that isclamped down upon the sameby screwing: on cap 33.; Diaphragm 41 is suitably. connected to. spindle 38, and the actuation of: the diaiphragm opens or closes the valve Iupon; itsfends. Centrally of cap 33 .is a: hollow Tstub 43 that is internally threaded to receive agbushing 44 having a central bore 45 of greater diameter than spindle 38 and "outside the head of this bushing and preferably. bearing against the same is ;a wing-nut 46 thatis,

adjustably mounted" upon th'etlireads of spindle 38. The adjusting of thisnut-regu-p lates the relative movementf'of the. spindle and the seating ofthe v'al'v'eswithrespect to the movement Of'ith diaphragm.

From .the structure ju'st' described the." fluid passes'through afshort tube47 to a; T 48 having aigauge 49.; upon its upperendyand astub'50. on its loweriarm that com municates with. :the pumping mechanism;

connectedby a pipe 52 to a T 53 and the inlet end of coil 13 opposite element: 14.".

The pumping mechanism to. which I have just referred comprises a' casing consisting.

of two cylindrical elements'54 and 55 Sup ported upon suitable standards or feet 56;

casing 54 being of shorter length than the; other section and the meeting edges of said.

the piston element so that the latter is securely fastened in position and the joint is packedto prevent the escape of fluid or' other material. Piston element 58 has a bore 3 that isenlarged, at 64, within the casing to receive a headed plug that is' screwedthereon and provided with a gasket 66 therebetween. The plug 65 is hollow and has a passageway 67 through its'head that iscountersunk to receive a valve .68, the stem 69whe-reof passes through a closure platef70 that is threaded on itsedge and screwed into. the adjacent-portion of plug 65. c This closure .plates70 has transverse.

apertures 71 'r.for medi.-therein, and a spring 72 of the expansion type surrounds the spins dle of the. valve between head 68 and plate 7 0. to normally retain the valve in seated positioni A reciprocable; cylinder 73 surroundsthe.

exterior of the stationary piston element 58, and is guidedbetween the same'and the inner surface of casingelements 54 and 55 the casing sections 54 and55, thestationary.

piston'element 58land the movable cylinder 7 3'are. otsuchinterior and. exterior dimensions that there is a snugfsliding fit between the same; The closed end. of the cylinder is provided. with1 a,.-hollo'w stub 74 that is threadedupon itsv exteriorto receive a cup shapedsleeve 75,1 the'oute'r end whereof is screwed upongthe reeiprocable shaft 76 that extends out; through the opposite end of cylinder. casing 55.; The latter, element is provided with a hollow stub 77 upon its outer ;.end'.;;that provides stufiing box throu h which -rod 76 'reciprocates;;and is provided with suitable q gasket 7 8' and a' glandrnut 7,9, Stuh74 ofthe cylinder cas; ing guides thespindle 80uoif a,conical valve 811that seatsna countersunk opening 82 in the. cylinder, head -,4 and; 1a 1 spring 83 extends l between a shoulder formed in the-valve seat} andfla mltg84 secured upon the oppositeend of -j-s'pindle 80 td'retainthe valve normally seated.

.Passageways M sai Cease, sides through cap-y 7 5 1- and hollow stub 74 so thatgrefrigerating fluid-received through pipe5Q that :iS tappedinto easing section 55 will pass into the cylinder past valve 81 upon the movement. of ,the cylinder in one direction to admit the. fluidintothe interior chamber of the cylinder. ,3 When the; cylinder is moved in the opposite direction the valve will seat, and the fluid under pressure is forced aga nst valve'68 wlnchopens and permits the. fluid to pass through apertures (1:.in'to passageway64 and out into coil 13 that are connected to the stub end of the stationary; .piston element.) I r .A suitable,- cup 86 is securedcasingsecg;

tionr54 adjacentl itsflouterendand below a suitable plug "'87 in the upper sectionof the casing to afl'ord facilities for draining and cleaning out. An oil feed 88 ofany suitable type is mounted upon a convenient portion of casing section 55 andcommunicates with the interior thereof, and a cup 89 is tapped into the lowermost portion of the casing section 55 adjacent its outer end and controlled by means of a cock 90 mounted'in the stub of said cup, in order to drain ofi such surplus oil as may accumulate in the cylinder. g

It will be observed that the pressure developed in the cylinder 73 will operate between the'interior walls ofthe cylinder and stationary piston 58 and between the exterior walls of cylinder 7 3 and the interior walls of the exterior casing in a direction tending to prevent the flow of such oil as is not carried on these parts by friction and which is necessary for lubrication with cylinder 73.

What I claim is: v

1. A pump comprising a hollow casing,

a stationary plunger mounted in one end thereof and spaced from the walls thereof; said plunger being centrally bored to pro vide therethrough a discharge outlet for said casing, a valve at the inner end of the bore of said plunger for controlling said passageway, a hollow stub extending from the opposite end of said plunger through an aperture in the adjacent end of said casing, a rod reciprocable in the opposite end of said casing, a movable pump cylinder reciprocable in said casing and open at one end to telescope said plunger, an oil-trap communicating with the lower segment of said casing beyond the path of movement of said pump-cylinder, a valve cage in the a stationary plunger mounted in one end 0 I said casing and extending outside the same, said plunger having a bore-providing discharge passageway extended through said casing, a hollow plug screwed into said bore and closing the inner end ofsaid passageway, said plug having a shouldered exterior to abut the end of the plunger, a checkvalve in the'bore of said plug permittin only the outward flow of fluid throughsai passageway, a pump cylinder reciprocable' within said casing and open at its end to telescope said plunger and plug, a hollow stub extending axially from the end of said cylinder opposite said plunger, a check-1 valve in said stub permitting only the in- Ward floweof fluid to the interior of-said cylinder, said stub having lateral ports com- 'mumcating with its interior chamber ad jacent said valve, and a reciprocable rod connected to said stub for actuating the cylinder; said rod journaled axially inthe end of said casing opposite the end in which said plunger is mounted.

Signed at Chicago, county of Cook and State of Illinois. 1 a

SOLOMON M. MILLER, 

